import java.util.ArrayList;

public class WeatherData implements Subject{
	private ArrayList observers;
	private float temperature;
	private float humidity;
	private float pressure;
	
public WeatherData(){
	observers = new ArrayList();
}

public void registerObserver (Observer o){
	observers.add(o);
}

public void removeObserver(Observer o){
	int i = observers.indexOf(o);
	if(i>=0){
		observers.remove(i);
	}
}

public void notifyObservers(){
	for(int i = 0; i < observers.size(); i++){
		Observer observer = (Observer) observers.get(i);
		observer.update(temperature, humidity, pressure);
	}
}

public void meassurementsChanged(){
	notifyObservers();
}

public void setMeasurement (float temperature, float humidity, float pressure){
	this.temperature = temperature;
	this.humidity = humidity;
	this.pressure = pressure;
	meassurementsChanged();
}
}
